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MySQL doesn't support some types of characters (such as emojis) with the utf8 encoding. You need to be on MySQL 5.5+ and force utf8mb4 (everywhere, client and server). You can do this sending the query "SET NAMES utf8mb4". Check this

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  • java.sql.SQLException: Unknown prepared statement handler (1) given to mysql_stmt_execute at com.mysql.jdbc.SQLError.createSQLException( at com.mysql.jdbc.MysqlIO.checkErrorPacket( at com.mysql.jdbc.MysqlIO.sendCommand( at com.mysql.jdbc.ServerPreparedStatement.serverExecute( at com.mysql.jdbc.ServerPreparedStatement.executeInternal( at com.mysql.jdbc.PreparedStatement.executeQuery( at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.executeQuery(

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